Thanks for the reply Pavle, I have used Anchors for buttons, just didn't think to use for GroupBoxes.

I'm having problems getting this to work correctly, hence the delay in the response.

I have four GroupBoxes on an options sheet. All four use the same code format as below. Opening the options sheet the first time all GroupBoxes work as intended, changing width as the window width is adjusted.

After clicking OK and reopening the options page the first GroupBox's width has reduced dramatically, as though the Sheet.Common.Width parameter is now -600. Standard width for my page is 780 to show all information. It remains like this no matter how many times the options page is reopened. The following three GroupBoxes work perfectly. It doesn't matter whether there are 1,2,3 or 4 GroupBoxes, the first coded GroupBox (as below) always has the same issue.

Peke wrote:Can you make screenshot showing the direction of resize that do not work?

Two screen shots (before and after) plus code. The first image is the first time the options page is opened. The second is what it looks like every time it is opened thereafter, even if the options page window is resized.